-
Yes, they do say that, but crossings are either open or they are not. If they are not then one would be too many. If they are, then 10 won't be a problem. OK some might be open and some closed but in that situation (i) it is then luck as to whether it is ones in the east or west and (ii) I doubt the race would go ahead anyway if things were still that dicey. It seems a false objective.
Also the ferry isn't a great idea from a distancing point of view
I think it's not so much about west vs east having open borders but the number of border crossings. With this setup you have only 5 countries (France, Switzerland, Italy, Albania and Greece) so 4 crossings.